subtract 10%iles   0.00266457    0.0362902    0.0682793     0.102732
     0.142565     0.191764     0.257668     0.358566     0.567421
diff 10%iles    -0.208431    -0.107269   -0.0596647   -0.0273819 -0.000563622
    0.0261064    0.0578918     0.104344     0.202655
stardiff 10%iles   -0.0595312   -0.0283713   -0.0140892  -0.00431214
   0.00390336    0.0119256    0.0209858    0.0334011    0.0583245
stardiff contour -excluded 0.005   -0.0595312    0.0583245